摘要: Numerous studies have attempted to isolate biological factors in the development of transgender identities through research into genetics, prenatal hormone exposure, neuroanatomy, and cognitive processing. Genetic demonstrate that chromosomal variations are uncommon but may occur at higher rates than general population. Candidate genes been investigated, with some positive results, though these yet be replicated. Investigations effects exposure on developing fetus focused gender identity intersex people, which is often unpredictable, proxy markers for such as finger length ratio birth order, do not show clear trends groups. A few small neuroanatomical distinctions results limited their scope due sample sizes confounding variables adult exposure. male-to-female (MTF) peo...
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